We've stayed at both. I prefer the Tropicana over the Desert Inn & Suites. I found the staff to be way more helpful & friendly. We had a major issue at the Desert Inn & the mgr really wasn't going to do anything to fix it until my MIL went all nuts on him......lol (the upstairs room overflowed their tub & it was coming thru the light fixture above one of our beds....they sent a maid up to change the bedding....the mattress was SOAKED).
The Trop has the standard motel room size. Not a lot of extra room, but good enough for sleeping & showering. The Desert has large rooms & suites.....great for big families.
We didn't do the breakfast at either so can't really comment on it.
The pool at the Trop is in the middle of the parking lot, but looked nice & never looked crowded. The pool at the Desert is small & inside & it was always overflowing with people.
The parking situation is not great at either. The Desert is pretty small & tight & if you have a larger vehicle, parking is a nightmare. We always found a spot at the Trop & the larger vehicle wasn't a problem.
Both are very close to the Pedestrian Crossing to
Disneyland....so great location!!!
We found the noise level at the Desert pretty bad at times. When we were at the Trop, there was a ton of noise out in the parking lot, but once inside our room, we didn't hear it.
Hope that helps!!